INEG4433_LSN9_08-web

INEG4433_LSN9_08-web - INEG 4433 Systems Engineering...

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LSN 9 1 INEG 4433– Engineering Design and Systems Management INEG 4433 Systems Engineering & Management Lesson 9: Problem Definition
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LSN 9 2 INEG 4433– Engineering Design and Systems Management Where are We? Last Time Stakeholder Analysis Next Time Problem Definition Value Modeling This Time Problem Definition Overview Problem Definition Overview System Decomposition System Decomposition Functional Analysis Functional Analysis
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LSN 8 3 INEG 4433– Engineering Design and Systems Management Needs Analysis What does the stakeholder really need?
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LSN 8 4 INEG 4433 – Systems Engineering Design and Management Identification of Stakeholders Who do you talk to? Whoever has a vested interest!
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LSN 8 5 INEG 4433 – Systems Engineering Design and Management The Systems Point of View Refers to looking at the entire system instead of focusing on only one specific aspect. Wholeness - looking at the “big picture.” Is concerned with the overall aspects of a system, not with the individual components, per se.
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LSN 8 6 INEG 4433 – Systems Engineering Design and Management Super-System System Sub-Systems Lateral Systems Hierarchical Structure
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LSN 8 7 INEG 4433 – Systems Engineering Design and Management System Component Function Structure * Structural * Operating * Flow The transformation process - - what does the system do? ITS PURPOSE Transformation Process Input Output * Super-system * Lateral Systems * Sub-System System Decomposition
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LSN 8 8 INEG 4433– Engineering Design and Systems Management Key Terms TITLE DEFINITION Design a tank Designing a Car Function: An activity that the system must be designed to perform and an evaluation consideration for alternative system designs. Destroy Targets Drive from A to B Objective: Preferred direction of attainment of an evaluation consideration. Higher Probability of Kill Higher Fuel Economy Evaluation Measure: Scale to measure the degree that we attain an objective (Yardsticks). Probability of Kill Miles per Gallon (MPG) Parameter: Internal characteristic of an alternative system; will not change while the system is in operation. Accuracy Fuel Capacity Variables: Operating conditions of a system that vary with time; often called state variables and change as the state of the system changes. Internal Temperature of Bore Site Fuel Level Constraints: Boundary conditions within which a system operates (Restrictions). Probability of Kill > 0.95 MPG > 26 Goals Stakeholder final endpoint; objectives support the goal. BEST TANK BEST CAR
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LSN 8 9 INEG 4433 – Systems Engineering Design and Management Component Function State Structure • Protection/Safety • Transportation Structural : Chassis Operating : Engine, Trans, Lights Flow : Fuel, Info, People, electricity Super: Car Makers, Policy Makers, US Trans Division Lateral: Other Vehicles Sub: Commo, AC, Radio, Braking System Engine: On, Off Lights: On, Off Fuel: Full, empty, 1/2 full Design of a Car as a System
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LSN 8 10 INEG 4433 – Systems Engineering Design and Management Classroom as a System?
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This note was uploaded on 04/12/2009 for the course INEG 4433 taught by Professor Pohl during the Spring '09 term at Arkansas.

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INEG4433_LSN9_08-web - INEG 4433 Systems Engineering...

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